The central theme to this one is a variation of the old story idea of a lone lawman transporting a prisoner to trial/justice. Invariably, the lawman encounters some sort of crisis that makes the task dangerous, harrowing, and other things decidedly non-routine.
In this particular story, the protagonist is flying through the sky with his prisoner in his arms. Not sure if the prisoner has already been convicted, and is being taken to prison, or if he's merely going to trial. In either case, the jetpack begins to malfunction. The protagonist makes an emergency landing on the ground of the planet.
Once on the ground, the prisoner reveals that he sabotaged the lawman's jetpack. Specifically, I think he put metal shavings or grit into the motor, which gradually destroyed the device. When asked by the protagonist why he did such a thing, the prisoner states that he wasn't going to be taken in, and he wanted the satisfaction of knowing the lawman would die, too.
On this particular planet, there is a smallish, but deadly creature that inhabits the wilds. It is a superb tracker, is quite powerful and well-armed, and its hide is such that it is almost impossible to kill, even with ray guns. Being nocturnal, the protagonist and his prisoner aren't in immediate danger, but once the sun sets, the prisoner is sure they are both doomed.
The protagonist-lawman, for his part, is determined not to die, and also to deliver the bad guy to justice. I believe he finds a narrow cave in which to hole up. I believe he also does his best to block up the entrance with rocks and other debris. When night falls, the tension builds, and eventually one of these dreaded creatures catches their scent and attacks.
I don't remember too many details about the fight. I do recall that the creature begins digging through the debris to get to them with a very distinctive sound. The protagonist shoots the creature with his beamer/ray gun, but the creature is not immediately slain. The protagonist is wounded in the leg with the creature's rasp-like tongue, which can pierce solid rock. The protagonist shoots the creature at least one more time, with the nemesis finally succumbing to the beam. The lawman (as common with the trope) has prevailed against great odds.
I believe the story closes with the protagonist having repaired his jetpack and bound his wounds, and telling his prisoner that it was time to go (sun was up), and that he was going to face justice after all.
Timeframe of Publication
Not really sure, but old. It read like something from the 50's or maybe early 60s at latest. I wouldn't be surprised if it was older than that, however.